Circular saw



FIG. 1 is a front elevational view of the design;

FIG. 2 is a rear elevational view of the design of FIG. 1;

FIG. 3 is a right side elevational view of the design of FIG. 1;

FIG. 4 is a left side elevational view of the design of FIG. 1;

FIG. 5 is a bottom plan view of the design of FIG. 1;

FIG. 6 is a top plan view of the design of FIG. 1;

FIG. 7 is a top-rear-right perspective view of the design of FIG. 1;

FIG. 8 is a front-left perspective view of the design of FIG. 1 where the blade and the base frame form a substantially 90° angle and the handle is lifted to form an acute angle with the base frame; and,

FIG. 9 is a front-left perspective view of the design of FIG. 1 where the handle and the blade tilt to the front so that the blade forms with the base frame an angle other than 90°. 

The ornamental design for a circular saw, as shown and described. 